Whilst not 'super-rare', a reasonably unusual occurrence was the use of a Solo on a return journey on the 7.
A problem with the vehicle on the inward journey seems to have led to it being swapped at the garage with 'whatever was there', which happened to be 2484. It was a case of 'blink and you've missed it', as the offending 'decker was fixed whilst the Solo faithfully trundled to Maidstone, and it was swapped back on the next journey.
Seen here at Tonbridge Castle, in the presence of a long-term damaged lamppost, as light faded rapidly on 29th December. The timetable case on the very right of the picture is now empty, the contents having been moved into the bus shelters on one of the blue backing sheets mentioned in a recent Invicta. Unfortunately, the role of the new contractor does not appear to extend to changing/removing the vastly outdated route numbers on the bus stop flag.
Chris